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guapka [62]
3 years ago
13

Mrs. McIntyre needs to buy pencils and erasers for her math class. The store is selling a box of pencils for $2 and a box of era

sers for $1. She needs to buy four times as many pencils as erasers. If she can only spend $18, how many boxes of each will she buy?
Mathematics
1 answer:
Marianna [84]3 years ago
5 0

Answer:

8 boxes of pencils and 2 boxes of erasers

Step-by-step explanation:

2 times 4 equals 8, which is the part where she needs to buy 4 times as many pencils as erasers.

8 times 2 is 16 and 1 times 2 is 2 add both 16 and 2 together and you get 18 so she spends all $18

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Step-by-step explanation:

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Let dimes = d and quarters =q

D + q = 50

D= 50-q

0.10d + 0.25Q = 7.70

Replace d with 50-q:

0.10(50-q) + 0.25q = 7.70

Simplify:

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Divide both sides by 0.15:

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Step-by-step explanation:

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